1667685101 has 2 divisors, whose sum is σ = 1667685102. Its totient is φ = 1667685100.

The previous prime is 1667685059. The next prime is 1667685113. The reversal of 1667685101 is 1015867661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1350489001 + 317196100 = 36749^2 + 17810^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667685101 - 2⁶ = 1667685037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1667685001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833842550 + 833842551.

It is an arithmetic number, because the mean of its divisors is an integer number (833842551).

Almost surely, 2^1667685101 is an apocalyptic number.

It is an amenable number.

1667685101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667685101 is an equidigital number, since it uses as much as digits as its factorization.

1667685101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 1667685101 is about 40837.3003637606. The cubic root of 1667685101 is about 1185.8725498076.

The spelling of 1667685101 in words is "one billion, six hundred sixty-seven million, six hundred eighty-five thousand, one hundred one".